Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 4195939 | Type bar actuating mechanism for a typewriter A typewriter of the kind having an array of typebars each movable by means of a flexible tension element or string connecting the typebar to the shank of a corresponding key, is provided with improved means connecting each string to the associated key. Th... | 04/01/1980 |
| 4185400 | Typewriter with instructional apparatus A typewriter and the like utilized as an instructional aid device has control means for teaching alphabetical letter recognition, the sequence of letters in forming words and the association of a word to the picture of an object. A coded card, the preferr... | 01/29/1980 |
